Controller.



PATENTED MAY 12, 1908. L. L. TATUM.

CONTROLLER.

APPLICATION FILED JUNE 2a. 1906.

2 SHEETS-SHEET 1.

INVENTOR Lewis L.Tatum WITNESSES ATTORNEY No. 887,442. PATENTED MAY 12, 1908. L. L. TATUM.. CONTROLLER.

' APPLICATION FILED JUNE 2a, 1906.

2 SHEETS-SHEET 2.

m U m T ML T m mw e W Y B 60 Volts WITNESSES To all 'tu'ihom it may concern.-

, My inventionrelates to multiple-voltage controlling thefijeld resistance.

a lever movable, over fixed contacts to vary wheel on the shaft ofthe controller drum ardrum is rov s fring-pre'ssedpawl' 5 cooperates. to douse the V UNITED. sTATnsP-ATENT OFFICE,

LEWrs L. TATUM, 0F NORWOOD, om-o,

ASSIGNOR To LM RSCOMPANX, A come; 4

, RATION, OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURINGCOMPANY. A

CORPORATION .OF onion CONTROLLER.

No.'ss7,'442.

Bpecification'of Letters Patent Patented my. 12, i 998.

- nppncation flled June'28,*1 906. serial-110123783.-

Beit known that-I, LEWIS L. TA'roM, citizen of the United States, residing at Norwood, in the county of Hamilton and State,

of Ohio,'have invented certain new and use ful Improvements in'Oontrollers', of which I the following is a-full, clear, and exactspeck fication.

controllersfor electric motors.

The" object of my invention is to so con: struct amultiple-voltage controller thatthe (lifl'erent mains may be connected to the armature as desired, that there'may-be a vari; able resistance for the'field circuit, land-if de-- sired-also o'neJfor the armature circuit, and

that these resistances'may both be governed by the controllerwithout requiring the con- Y troller drum to be of an undue length.

In one aspect .my" invention comprises a multiple-voltage controller consisting of a rotatabledrum controlling theconnection of the armature 'to the different mainsof {the system, and a lever movable by the drum for In. a more s ecificcaspect my nvention comprises a mu ti'ple-voltage controller con: sisting of a rotatable drum," contact fingers cooperating"therewithand so arranged that-- as the drum is rotated the armatureisconnected' acrossma'ins' of-ldiffe'rent voltages and aresistance in the armature circuit is varied,

a resistance in the field-circuit, and a star ranged to move said lever as the tated..,

' Other features of my invention will appear from'the description and drawings and will be-specifically set forth int-he claims. Figure lfis 'a plan view' of my controller with the top cover removed. Fig. 2 is, an end View of the fieldresistance and. the lever for varying it, 'Fig. 3 is afront'elevation-ofj the upper part of the controller, with the front-casing removed. Fi LA; is a diagram showing theconnections o a controller embodying my invention. 1

I The controller drum isrepresented by 1 and is mounted on a shaft 2. Thi's drum-1's-rotatable bythe usual handle 3. On the .shaft'2 is a notch plate 4, with the peripheryxof which a V notch There is but a small distance between succes- -mains, buta greater .mature'from one set 8, on the periphery mounted on al'ever 1.0.

the controller drum. gagement betweenthe roller 9 and the star- 10 is moved in and out as the controller drum isro'tated. The end of- 1 Wheel 8,this lever and 13/ v ranged as in the well known When the controller-is 'm to stop in-the properr positions. This plate is arranged with-sets of notchesb.

siv'e notches ,in' the same set.,ithus causing a comparatively small movement of the :drum' while passing betweendifferentpoints when the armature is connected to the same set of 7 between successive e connections of the arv of mains to another.' p [Also mounted on the shaft 2,is astar wheel controller changes th The lever110 is 11 (listanceand large-horns sets of notches, thus re-;

iquiring a much lar 'er movement when the which ridesa roller 9,

ported inany desired-manner, as from t e controller covenand iss ring-pressed toward y reason of the. en-

lever 10 is provided with a split contact fingen 11 preferably insi1l-ated from the 'lever.

s finger-11" passes "between and engages] the sets of contacts 12Iand113 ,and as'it is out the field resistance sections- 14 and 15, which are connected with I the contacts 1 2 The resistances 14 and .15 are varied alternately,

Thus the field resistances moved by the rotation. of the drum, cutsin or i because-the two halves of: finger 11 are ofls'et from each'other, as shown plainly-in Fig, 2. 1 -14 and l5"-are cut in or outin four steps; I

This number of steps may bevaried as de sired by increasing the number of sections in resistances 14 alnd'15and increasing the number of contacts Hand 13 correspondingly;

-,The contact" fingers .16 to 25--inclusive- 1cooperatewith the contacts on drum 1, the con vta'cts 16 and c5 beingconnected'to two terminals ofthe motor armature 31, the contacts 21 to 25 inclusive being connected" to different points on the armature resistance 26 and the'contacts 17 to 20 being connected respectively to the different mains 27- to 30 respectively Between each 'p'air of adj acent majnsthere is a difierent voltage, ar-

multipleevoltage system; The field 3 2 ofthe motor ifsconn'ected between the outside. mains 27 and 3.0 andin series with the resistances '14 andlfi.

the parts are as-shown in'full'lines'in Fi 1': When the controller I is movedif into I ita- ,l t T operative position a}, thewlever-'IOL-ismOYBd into thev position shownin dotted lines in. Fig. 1, and the field resistances 14 and 15' are entirely out out, while the armature 31 is connected acrossthe mains 27 and'28 with the full armature resistance 26in serieswith it. Asthe drum is moved forward to position a the armature resistance is out out step by step, the field resistances during this time remaining unchanged because between positions a and a there is no eccentricity in thestar wheel 8. As the controller is moved,

between positions at and a, the field resist substitutions may be made in the articular ances 14 and 15 are gradually 'cut into thecircuit, thus decreasing the field strength of the motor and increasing its speed. When the controller is moved mto position b the,

armature 31 is connected across mains28 and 29, thus having a higher voltage, im

pressed on it, and at the-same time the field resistances are-cut out of circuit. As the controller is moved forward to position b, the field resistances are gradually .cut into circuit, thus again weakenmg the motor field. The same'series of operations of simultaneously connecting the motoracross mainsof' a higher voltage and simultaneously cutting out the field resistances and then gradually cutting insaid fieldresistances, again takes place as the-controller is moved-to and through each of the other sets of positions 0 too, d to d 6 to e andf tof These positions are marked in Fig. 1 for both the notch-plate 4' and the star wheel 8, and in Fig. tfor thedrum. I With the controller arranged as shown the armature resistance is not. used savewhen the controller is connected to the lowest voltage,,but fit. is obvious that if desired this ar-. mature resistance may be'use'd at any or every set of positions. The field circuit of the motor isnever broken by the controller.

but is arranged to' be broken when the switch 33 is opened, this switch 33 entirely isconnecting the controller and the motor. In the controller shown the field resistances are cut in and-out completely at each set of positions, but obviously either the cutting in or out maybe only-partial at any set ofpositions if such a construction is desired. -1

Itis obvious'that many modifications and arrangement whleh I'have here s own and described, Without departing from the broad spirit and scope of my invention, and in, the following clanns I aim to cover broadly the new combinations invented by me.

- :Wh-at I'claim as new is: e

1. 'A multi' le-voltage controller, compris- .ing a' rotata le drum for connecting the armature of a motor between different sets of .mains, and a lever pivoted eccentrically of said drum and arranged to be moved u on rotation of said drum for varying. the ield resistance of said motor.

' 2. A multiple-voltage controller,-comprising a ro'tatabl''drum arranged to connect the armature of a motor between difierent sets of mainsjand to-vary a 'resistance in the armature circuit, and a lever pivoted eccentrically ofv said drum and Larranged to be moved upon rotation of said drum to vary a the resistance in thefield circuit, of the IIL l/OL- 3. In. a multiple-voltage controller, a

rotat'able drum arranged 'to connect-a motor armature across difierent sets of mains, and a lever pivoted 'eccentrically of Salli drum and arranged to be, moved upon rotation of said drum for varying the ampereturns of the motor field magnet. a

4. A multi lo-voltage controller, comprising a rotatab e drum arranged to connect a motor armature across different sets. of mains, astar wheel'bnthe shaft of said'drum, and 'a lever movable by said star. wheel to vary the resistance in the field circuit of the 5. In combination, a rotatable drum arranged to vary a resistance in one circuit,

and a lever pivoted ecce'ntrically of said a drum and arranged as said drum is rotated in one direction from oif position to be reciprocated to vary 'the re'sistance in another which'the said drum cooperates to connect the armature of a motor across different .sets ofmains, a star wheel on the shaft ot said drum,

and a lever movable bysaid star wheel to vary,

the resistance in the field circuitof the motor.

. 8 Amultip'le-voltage controller, comprising, a .rotatab e drum arranged to connect a motor armature across different sets of.

mains, and a lever pivoted eccentrically of said drum-andarranged to be'moved upon rotation of said'drum to vary the resistance in the field circuit of said motor, andso arranged that this resistance is out outas the controller .is moved to connect the motor ar.

mature to mains of a higher voltage and is cut as the controller is moved forward without varying the'connections of the armature.

9. Incornbina'tion, a motor, a rotatable drum arranged. to connect the motor armature across mains of different voltages, a star-wheel on the shaft otsaid drum, and a lever movable by said star wheel to vary theresistance in the field circuit .of the motor and arrangedjto out said resistance out when the controller is moved forward toconnectthe' armature to mains of a higher voltage and to gradually cut said-resistance-i'n again as the controller is movedforward without varying the armature connections.

. -10, A controller, comprising a rotatable drum for va1"ying the connections of a-motor armature, and an arm for varying a resistance in the field circuit of said'm'otor and arranged to bereciprocated as the drum is rotatedin one direction from off osition.-

11. A multiple-Voltage contro er, comprising a rotatable drum for connecting a motor armature between difierent'setsof mains, and an arm forvaryinga resistance in the field'circuit of said motorand arranged to be reci rocated as said" drum is rotated.

12'. n a multiple voltage controller, a ro .tatable drum arranged toconnect a motor armature across difler'ent sets of mains, an arm for varying the ampere turns of the field magnet of said motor, and means for recip- I rocating said lever as the drum is rotated.

J 13. In a multiple-voltage controller, a rotat'able drum arranged to connect a-motor armature across different sets of mains, an arm movable otherwise than around the axisof the shaft to vary the resistance in the lield circuit of the motor, and a common operating handle for said shaft and said auxiliary member In testimony whereof I affix my signature, in the presence of two witnesses.

L'EWIS L. TATUM.

' Witnesses-z GEO. B. SonLEY. FRED J. KINsEY. 

